/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/MeshNormals.h
static void InitializeOverlayTopologyFromOpeningAngle ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * Mesh, [FDynamicMeshNormalOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshNormalOverlay) * NormalOverlay, double AngleThresholdDeg )